HtmlTable.selectNone fails with empty table

[jfly]

HtmlTable.selectNone is failing when my table is empty. This appears to be due to the fact that HtmlTable.selectRange doesn't do very good bounds checking. It bounds properly bounds endRow, but doesn't deal with startRow < 0. Here's the relevant section of code:

selectRange: function(startRow, endRow, _deselect){
    if (!this.options.allowMultiSelect && !_deselect) return;
    var method = _deselect ? 'deselectRow' : 'selectRow',
        rows = Array.clone(this.body.rows);

    if (typeOf(startRow) == 'element') startRow = rows.indexOf(startRow);
    if (typeOf(endRow) == 'element') endRow = rows.indexOf(endRow);
    endRow = endRow < rows.length - 1 ? endRow : rows.length - 1;

    if (endRow < startRow){
        var tmp = startRow;
        startRow = endRow;
        endRow = tmp;
    }

    for (var i = startRow; i <= endRow; i++){
        if (this.options.selectHiddenRows || rows[i].isDisplayed()) this[method](rows[i], true);
    }

    return this;
},

Here's my suggested fix:

selectRange: function(startRow, endRow, _deselect){
    if (!this.options.allowMultiSelect && !_deselect) return;
    var method = _deselect ? 'deselectRow' : 'selectRow',
        rows = Array.clone(this.body.rows);

    if (typeOf(startRow) == 'element') startRow = rows.indexOf(startRow);
    if (typeOf(endRow) == 'element') endRow = rows.indexOf(endRow);

    if (endRow < startRow){
        var tmp = startRow;
        startRow = endRow;
        endRow = tmp;
    }

    var rowAfterEndRow = Math.min(endRow + 1, rows.length);
    startRow = Math.max(startRow, 0);

    for (var i = startRow; i < rowAfterEndRow; i++){
        if (this.options.selectHiddenRows || rows[i].isDisplayed()) this[method](rows[i], true);
    }

    return this;
},

[jfly]

I dug into this a bit more, and it appears that there are already tests in the Specs directory which tickle this problem.

Without my change:

should select all and select none
TypeError: Cannot call method 'isDisplayed' of undefined

Whereas with my change, this test passes.

(I ran this test by simply opening up .../mootools-more/Tests/Specs/Runner/runner.html?preset=more-all&spec=HtmlTable.Select%20should%20select%20all%20and%20select%20none. in my browser)

In fact, running Tests/Specs/Runner/runner.html without my change gives me

549 specs, 968 assertions, 19 failures in 7.241sFinished at Fri Dec 16 2011 03:43:59 GMT-0800 (PST)

and with my change:

549 specs, 974 assertions, 17 failures in 7.247sFinished at Fri Dec 16 2011 03:42:48 GMT-0800 (PST)

[jfly]

I've updated my pull request to fix the bug you pointed out. I believe it is better to fix the selectNone() method than to hack around it in the empty() method.